217249532 has 6 divisors (see below), whose sum is σ = 380186688. Its totient is φ = 108624764.

The previous prime is 217249507. The next prime is 217249537. The reversal of 217249532 is 235942712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 217249492 and 217249501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217249537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27156188 + ... + 27156195.

It is an arithmetic number, because the mean of its divisors is an integer number (63364448).

Almost surely, 2^217249532 is an apocalyptic number.

It is an amenable number.

217249532 is a deficient number, since it is larger than the sum of its proper divisors (162937156).

217249532 is a wasteful number, since it uses less digits than its factorization.

217249532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54312387 (or 54312385 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 217249532 is about 14739.3870971625. The cubic root of 217249532 is about 601.1547502348.

The spelling of 217249532 in words is "two hundred seventeen million, two hundred forty-nine thousand, five hundred thirty-two".